“despite 500 years of mesorah not to, to me it says that either these people are so exceedingly knowledgeable in their torah knowledge that they feel comfortable discarding the last 500 years of practical halachic practice, or, they simply dont care.”
Rabbi Ovadia Yosef z’tz’l ruled that a woman can read Megillat Esther for a man l’chatchila, despite 500 years of mesorah not to. Into which category would you put him? (He does have the support of an uncontested mishnah, an uncontested gemara, Rashi, Rambam, and the Shulchan Aruch.)